diff --git a/woa/init.py b/woa/init.py
index 63a1579..18737e0 100644
--- a/woa/init.py
+++ b/woa/init.py
@@ -163,11 +163,11 @@ class WOAHandler:
 		try:
 			if echo_str:
 				# GET 请求：验证 URL
-				echo_str = self.crypto.check_signature(signature, timestamp, nonce, echo_str)
+				echo_str = self.crypto._check_signature(signature, timestamp, nonce, echo_str)
 				return True, echo_str
 			else:
 				# POST 请求：验证签名 (不返回 echo_str，只返回 True)
-				self.crypto.check_signature(signature, timestamp, nonce)
+				self.crypto._check_signature(signature, timestamp, nonce)
 				return True, None
 		except InvalidSignatureException:
 			logger.warning("签名验证失败")